CN110531164A - The microwave remote sensor for Measuring Dielectric Constant based on SIW-CSRR - Google Patents
The microwave remote sensor for Measuring Dielectric Constant based on SIW-CSRR Download PDFInfo
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- CN110531164A CN110531164A CN201910766950.8A CN201910766950A CN110531164A CN 110531164 A CN110531164 A CN 110531164A CN 201910766950 A CN201910766950 A CN 201910766950A CN 110531164 A CN110531164 A CN 110531164A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2617—Measuring dielectric properties, e.g. constants
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Abstract
The present invention discloses the microwave remote sensor for Measuring Dielectric Constant based on SIW-CSRR.The present invention includes dielectric layer, top layer metallic layer, bottom metal layer；There are two metal CSRR structures for top layer metallic layer cutting；Above-mentioned two metal CSRR structure is made of two split-ring resonators of different sizes, and wherein split-ring resonator is opening grooved ring；Smaller opening ring resonator is embedded in larger open ring resonator；The opening direction of two split-ring resonators is opposite；Larger open ring resonator opening to the spatial position of smaller opening ring resonator is electric field strength maximum, the smallest region of magnetic field strength, which places sample to be tested.Product of the present invention anti-interference ability is stronger, structure is simpler, low cost, easy to carry and the sensor sensitivity and quality factor performance it is fine, the Q value of the novel microwave resonator reaches 786.5 simultaneously, is readily applicable to the dielectric constant of precise measurement magnetic media material.
Description
Technical field
The invention belongs to microwaves and radio frequency arts, in particular to a kind of to integrate (substrate based on substrate
Integrated waveguide-SIW) structure complementary open-loop resonator (complementary split ring
Resonator-CSRR) for measuring the novel microwave sensor of magnetic media material dielectric constant.
Background technique
In recent decades, radio circuit is developing at an amazing speed with microwave technology, makes it not only in traditional army
Thing sciemtifec and technical sphere (such as radar detection, electronic countermeasure and satellite communication) is applied, while also having penetrated into each civilian neck
Domain (such as industrial products line traffic control and biologic medical detection).With various types of radio frequency microwave circuits, module and basis
Device etc. is by gradually development and application, it has been found that the electromagnetic property pole of microwave material used in these high-frequency circuits and device
The big performance parameter for affecting device element, therefore the detection of microwave material electromagnetic property and research are gradually weighed
Depending on wherein most important is exactly the dielectric constant of the material known to us.
The essence of dielectric constant is to reflect one of the important physical property of substance electromagnetic property, it be substance and electromagnetic field it
Between the important tie that interacts.The detection technique of dielectric constant is developed so far, and receives the extensive pass of academia and industry
Note.In recent years, due to substrate integration wave-guide (SIW) have structure is simple, loss is low, small in size, quality factor is high, be easy to and
The advantages that PCB, low-temperature co-fired ceramics (LTCC) process compatible, gradually causes the extensive concern of people.Complementary split ring resonance
Device structure (CSRR) can be such that microwave radio energy more concentrates in specific region, be more advantageous to measurement, and make the knot of measurement
Fruit is more acurrate.Therefore, present invention incorporates the advantages of both structures design it is a kind of novel normal for measuring object dielectric
Several microwave remote sensors, entire resonator structure is small and exquisite, and for anti-external environmental interference ability than more prominent, measurement is accurate.
Summary of the invention
The dielectric constant of the main measurement of species of the purpose of the present invention proposes a kind of based on substrate integration wave-guide and complementation
Open ring structure combines, and new design inherits the advantage of both structures, so that this novel microwave resonator performance
Higher performance advantage is gone out.
The present invention is realized by following technical scheme:
The microwave resonator be two end device, including dielectric layer, positioned at dielectric layer upper surface top layer metallic layer, be located at
The bottom metal layer of dielectric layer lower surface, two input ports for connecting SMA connector；
There are two metal CSRR structures for the top layer metallic layer cutting；
Above-mentioned two metal CSRR structure is made of two split-ring resonators of different sizes, wherein split-ring resonator
For the grooved ring that is open；Smaller opening ring resonator is embedded in larger open ring resonator；The opening side of two split-ring resonators
To opposite；
The center of two split-ring resonators and the structure centre of microwave resonator are Chong Die；
Larger open ring resonator opening to the spatial position of smaller opening ring resonator is electric field strength maximum, magnetic field
The dielectric constant that sample to be tested can be used for sample to be tested more satisfactoryly is placed in the smallest region of intensity, the region；
The symmetrical two sides of top layer metallic layer have first rectangular notch, the second rectangular notch；
Straight line where two rectangular notch centers is Chong Die with the straight line where two split-ring resonator opening centers.
First input port is connect with one end of the first microstrip line, and the other end of the first microstrip line protrudes into first rectangular notch
It is connect with top layer metallic layer, the second input port is connect with one end of the second microstrip line, and the other end of the second microstrip line protrudes into
Two rectangular notches are connect with top layer metallic layer；
First microstrip line, the second microstrip line are located on the straight line where two split-ring resonator opening centers.
The surrounding edge of top layer metallic layer is provided with several metal throuth holes of periodic distribution in addition to rectangular notch position, uses
In connection two metal layers；
SIW is constituted by above-mentioned metal throuth hole, for preventing external environmental interference, improves measuring accuracy, and can press down
The microwave radio energy leakage of input is made to exterior space, improves the energy utilization efficiency of resonator.
Preferably, the dielectric layer is rectangular pcb board.
Preferably, the groove width of two split-ring resonators is identical；The opening spacing of larger open ring resonator and two openings
Gap between ring resonator is equidistant.
Compared with prior art, the present invention having following protrusion substantive distinguishing features and significant technological progress:
For the present invention compared with existing microwave remote sensor, anti-interference ability is stronger, and structure is simpler, low cost, convenient for taking
The sensitivity of band and the sensor and quality factor performance it is fine, while the Q value of the novel microwave resonator reaches 786.5,
It is readily applicable to the dielectric constant of precise measurement magnetic media material.
Detailed description of the invention
Fig. 1 is structural schematic diagram and parameter mark figure of the invention: wherein (a) sensor top-level schematic, (b) is sensed
Device bottom schematic diagram；
Fig. 2 is S parameter schematic diagram of the invention；
Fig. 3 is the electric-field intensity distribution schematic diagram of microwave resonator of the present invention, wherein oval dotted line position is electric-field strength
Spend maximum region；
Fig. 4 is the relation schematic diagram of the dielectric constant of transmission coefficient and sample to be tested of the invention, as measured material is situated between
The resonance frequency of the increase of electric constant, resonator gradually becomes smaller, reflection coefficient S21Also it becomes larger.
Fig. 5 is novel high-performance microwave resonator of the invention in the obtained S parameter measured with vector network analyzer；
It is measured object that the measurement of microwave resonator vector network analyzer has differing dielectric constant that Fig. 6, which is of the invention,
The reflection coefficient S that body obtains21Schematic diagram；
Wherein 1. the oneth SMA connector；2. the first microstrip line；3. metal throuth hole；The outer grooved ring of 4.CSRR；5.CSRR inside groove
Ring；6. electric field strength maximum region；7. dielectric layer；8. the second microstrip line；9 the 2nd SMA connectors；10. bottom metal layer.
Specific embodiment
With specific embodiment, invention is further described in detail with reference to the accompanying drawing.
It is structural schematic diagram of the invention as shown in Figure 1, sensor of the invention includes top layer metallic layer, dielectric layer 7, bottom
Layer metal layer 10, top layer metallic layer is by two metal CSRR structures of cutting, the first microstrip line 2, the second microstrip line 9；Two gold
Belong to CSRR structure to be made of two split-ring resonators of different sizes, it is humorous that smaller opening ring resonator is embedded in larger open ring
It shakes in device, referred to as larger open ring resonator is the outer grooved ring 4 of CSRR below, and smaller opening ring resonator is grooved ring 5 in CSRR.
Wherein the first microstrip line of top layer 2 is connected with the first SMA connector 1, and top layer the second microstrip line 8 and the 2nd SMA connect
Connector 9 is connected, and bottom metal layer 10 couples grooved ring 5 in the outer grooved ring 4 of CSRR and CSRR of top layer, and there are two sensitizing ranges for grooved ring tool
Domain, it is electric field strength maximum region 6 that wherein grooved ring, which is open to the groove region of the composition of grooved ring 5 in CSRR, which places to be measured
Sample can measure the dielectric constant of sample.
It is imitative that sensor of the invention design carries out structural modeling under all-wave 3 D electromagnetic simulation software AnsysHFSS environment
Very, structure relative dimensions are obtained by software calculation optimization, shown in table specific as follows:
Remarks: the wall edge lengths of L1:SIW；L2, L3: the length and width of first rectangular notch, the second rectangular notch；L4 first is micro-
Line width with line, the second microstrip line；Larger open ring resonator is square opening grooved ring, and opening is located therein in one side
The heart, a indicate its side length；The spacing of g: two split-ring resonators, the extended distance of two split-ring resonators；W: two split ring resonance
The groove width of device；D1: the aperture of the metal throuth hole of SIW is constituted；D2: the distance of adjacent two metal throuth hole.
Wherein interlayer layer 7 (pcb board) chooses high frequency plate F4B_2.65 (dielectric constant 2.65, with a thickness of 1mm, electricity
Dielectric loss 0.009).
It is the S parameter schematic diagram of the single resonator emulation of microwave resonator module of the invention as shown in Figure 2, as seen from the figure
The resonance frequency of resonator is near 1.58GHz, the S parameter data that are obtained by the measurement of the microwave resonator of Fig. 5 actual measurement
It can be seen that resonator resonance frequency is near 1.587GHz and simulation result is almost the same, additionally due to using the knot of SIW
Structure has preferable isolation to the interference of external environment, improves the precision of test in system work, in addition it is also possible to
The energy for substantially reducing input signal is radiated outside in environment to which enabled amount concentrates in resonant cavity, improves resonator
Susceptibility and energy utilization efficiency.
It is the single resonator material object field intensity distribution schematic diagram of microwave resonator module of the invention, top layer as shown in Figure 3
The region of inside and outside grooved ring opening is that electric field strength is maximum in CSRR grooved ring, and magnetic field strength is minimum, therefore the region is to magnetoelectricity sample
The change in dielectric constant of product is very sensitive, and the dielectric constant of sample can be measured by placing sample to be tested in the region.
It is the relation schematic diagram of the dielectric constant of resonator transmission coefficient and sample to be tested of the invention as shown in Figure 4, to
Sample is placed on the maximum region of magnetic field strength in first sensor, when the dielectric constant of sample to be tested changes to 10 from 1
When, first resonant frequency point of sensor drops to 1.472GHz from 1.583GHz, with the increase resonance frequency of dielectric constant
It gradually decreases, transmission coefficient S21It is gradually lowered.
It is measured object that the measurement of microwave resonator vector network analyzer has differing dielectric constant that Fig. 6, which is of the invention,
The reflection coefficient S that body obtains21Schematic diagram.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements not by aforesaid way
Limitation, as long as the improvement for the various unsubstantialities that the inventive concept and technical scheme of the present invention carry out is used, or without changing
It is within the scope of the present invention into the conception and technical scheme of the invention are directly applied to other occasions.
Claims (5)
1. it is two end device the microwave remote sensor for Measuring Dielectric Constant based on SIW-CSRR, including dielectric layer, is located at
The top layer metallic layer of dielectric layer upper surface, positioned at the bottom metal layer of dielectric layer lower surface, two for connecting SMA connector
Input port；It is characterized in that there are two metal CSRR structures for the top layer metallic layer cutting；
Above-mentioned two metal CSRR structure is made of two split-ring resonators of different sizes, and wherein split-ring resonator is to open
Mouth grooved ring；Smaller opening ring resonator is embedded in larger open ring resonator；The opening direction phase of two split-ring resonators
Instead；
The center of two split-ring resonators and the structure centre of microwave resonator are Chong Die；
Larger open ring resonator opening to the spatial position of smaller opening ring resonator is electric field strength maximum, magnetic field strength
Sample to be tested is placed in the smallest region, the region；
The symmetrical two sides of top layer metallic layer have first rectangular notch, the second rectangular notch；
Straight line where two rectangular notch centers is Chong Die with the straight line where two split-ring resonator opening centers；
First input port is connect with one end of the first microstrip line, and the other end of the first microstrip line protrudes into first rectangular notch and top
Layer metal layer connection, the second input port are connect with one end of the second microstrip line, and the other end of the second microstrip line protrudes into the second square
V notch v is connect with top layer metallic layer；
First microstrip line, the second microstrip line are located on the straight line where two split-ring resonator opening centers；
The surrounding edge of top layer metallic layer is provided with several metal throuth holes of periodic distribution in addition to rectangular notch position, for connecting
Connect two metal layers；SIW is constituted by above-mentioned metal throuth hole.
2. the microwave remote sensor for Measuring Dielectric Constant based on SIW-CSRR as described in claim 1, it is characterised in that
The dielectric layer is rectangular pcb board.
3. the microwave remote sensor for Measuring Dielectric Constant based on SIW-CSRR as described in claim 1, it is characterised in that
The groove width of two split-ring resonators is identical.
4. the microwave remote sensor for Measuring Dielectric Constant as claimed in claim 1 or 3 based on SIW-CSRR, feature exist
Gap between the opening spacing and two split-ring resonators of larger open ring resonator is equidistant.
5. the microwave remote sensor for Measuring Dielectric Constant based on SIW-CSRR as described in claim 1, it is characterised in that
The wall edge lengths L1 of SIW is 100mm；First rectangular notch, the size of the second rectangular notch are identical, and long L2 is 16.4mm, wide L3
For 9mm；First microstrip line, the size of the second microstrip line are identical, and line width L4 is 1.1mm；Larger open ring resonator is square
Be open grooved ring, and opening is located therein the center on one side, and side length a is 32mm, and the spacing g of two split-ring resonators is 1.6mm, and two open
The extended distance g of choma resonator is 1.6, and the groove width W of two split-ring resonators is 1.6mm；Constitute the hole of the metal throuth hole of SIW
Diameter d1 is 1, and the distance d2 of adjacent two metal throuth hole is 2mm.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110108949A (en) * | 2019-05-10 | 2019-08-09 | 杭州电子科技大学 | For measuring the novel microwave sensor of magnetic media material dielectric constant and magnetic conductivity |
| CN111855761A (en) * | 2020-07-29 | 2020-10-30 | 电子科技大学 | Gas dielectric constant testing device |
| CN112782486A (en) * | 2021-01-26 | 2021-05-11 | 南京邮电大学 | Multi-frequency-point dielectric constant measuring device based on stepped impedance resonance structure |
| CN112798870A (en) * | 2020-12-09 | 2021-05-14 | 西南大学 | Microwave differential sensor based on substrate integrated waveguide reentry type resonant cavity and microfluidic technology |
| CN113218967A (en) * | 2021-05-26 | 2021-08-06 | 江南大学 | Uric acid microwave biosensor based on RFID concept and application thereof |
| CN113640587A (en) * | 2021-08-26 | 2021-11-12 | 安徽师范大学 | Dual-band lossless dielectric constant measuring sensor based on spiral resonator |
| CN114441558A (en) * | 2022-01-30 | 2022-05-06 | 西南大学 | High-resolution radio frequency tag sensor based on microwave negative resistance circuit compensation technology |
| CN114660365A (en) * | 2020-12-23 | 2022-06-24 | 安徽师范大学 | 5G dual-band dielectric constant nondestructive measurement method of surface sensor based on double complementary open loops |
| CN115267347A (en) * | 2022-06-08 | 2022-11-01 | 安徽师范大学 | High-sensitivity dual-band microwave sensor for measuring low dielectric constant |
| CN117309906A (en) * | 2023-09-27 | 2023-12-29 | 江南大学 | VOCs sensor without sensitive material and VOCs detection method |
| RU2811857C1 (en) * | 2023-03-17 | 2024-01-18 | Акционерное общество "Обнинское научно-производственное предприятие "Технология" им. А.Г.Ромашина" | Method for determining dielectric properties of destructive materials during heating |
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| CN110108949B (en) * | 2019-05-10 | 2021-05-07 | 杭州电子科技大学 | Microwave sensor for measuring dielectric constant and magnetic permeability of magnetic medium material |
| CN110108949A (en) * | 2019-05-10 | 2019-08-09 | 杭州电子科技大学 | For measuring the novel microwave sensor of magnetic media material dielectric constant and magnetic conductivity |
| CN111855761A (en) * | 2020-07-29 | 2020-10-30 | 电子科技大学 | Gas dielectric constant testing device |
| CN112798870A (en) * | 2020-12-09 | 2021-05-14 | 西南大学 | Microwave differential sensor based on substrate integrated waveguide reentry type resonant cavity and microfluidic technology |
| CN114660365A (en) * | 2020-12-23 | 2022-06-24 | 安徽师范大学 | 5G dual-band dielectric constant nondestructive measurement method of surface sensor based on double complementary open loops |
| CN112782486A (en) * | 2021-01-26 | 2021-05-11 | 南京邮电大学 | Multi-frequency-point dielectric constant measuring device based on stepped impedance resonance structure |
| CN113218967B (en) * | 2021-05-26 | 2022-04-22 | 江南大学 | Uric acid microwave biosensor based on RFID concept and application thereof |
| CN113218967A (en) * | 2021-05-26 | 2021-08-06 | 江南大学 | Uric acid microwave biosensor based on RFID concept and application thereof |
| CN113640587A (en) * | 2021-08-26 | 2021-11-12 | 安徽师范大学 | Dual-band lossless dielectric constant measuring sensor based on spiral resonator |
| CN113640587B (en) * | 2021-08-26 | 2023-01-13 | 安徽师范大学 | Dual-band lossless dielectric constant measuring sensor based on spiral resonator |
| CN114441558A (en) * | 2022-01-30 | 2022-05-06 | 西南大学 | High-resolution radio frequency tag sensor based on microwave negative resistance circuit compensation technology |
| CN114441558B (en) * | 2022-01-30 | 2024-03-15 | 西南大学 | High-resolution radio frequency tag sensor based on microwave negative resistance circuit compensation technology |
| CN115267347A (en) * | 2022-06-08 | 2022-11-01 | 安徽师范大学 | High-sensitivity dual-band microwave sensor for measuring low dielectric constant |
| RU2811857C1 (en) * | 2023-03-17 | 2024-01-18 | Акционерное общество "Обнинское научно-производственное предприятие "Технология" им. А.Г.Ромашина" | Method for determining dielectric properties of destructive materials during heating |
| CN117309906A (en) * | 2023-09-27 | 2023-12-29 | 江南大学 | VOCs sensor without sensitive material and VOCs detection method |
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